Call Of Duty: Modern Warfare 2's Minibak is a fan favorite and, much like its predecessors in past game releases, an excellent Submachine Gun. With excellent mobility, fire rate, and accuracy, it is hard not to fall in love with this machine for all close-quarters combat and mid-range scenarios.

But, the Kastov-74u is different this time around and you'll have to level up the following weapons in order to unlock it.

1
Level up the Kastov 762 to LVL 16 (You unlock this weapon naturally at LVL 23) This will unlock the Kastov 545.
2
Next, level up the Kastov 545 to LVL 13 and this should unlock the Kastov-74u.